Boil/Mash Screens are designed to be used during the mashing process as a false bottom or in a boil to filter out whole hops (we do not recommend using them if boiling with pellet hops). Fits all ball valve conversions. 7" Stainless Steel Tube with a 1/2" NPT Stainless fitting. Also known as "Bazooka" or "Torpedo" Screens.